%0 Journal Article %A A. G. Baskakov %T Spectral analysis of linear differential operators and semigroups of difference operators %J Doklady Akademii Nauk %D 1995 %P 295-298 %V 343 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1995_343_3_a0/ %G ru %F DAN_1995_343_3_a0